React Input Number only Positive

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React
        function App() {
            const [inputValue, setInputValue] = useState('');

const handleInputChange = (e) => {
                const value = e.target.value;

// Allow only positive numbers
                if (/^[0-9]*$/.test(value)) {
                    setInputValue(value);
                }
            };

return (
                <div className='container'>
                    <h3>React Js Input field Allow only Positive Number</h3>
                    <input
                        type="text"
                        value={inputValue}
                        onChange={handleInputChange}
                        placeholder="Enter a positive number"
                    />
                </div>
            );
        }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        * {
            box-sizing: border-box;
        }

body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }

.container {
            margin: 0 auto;
            width: 600px;
            text-align: center;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            padding: 20px;
        }

h3 {
            margin-bottom: 20px;
        }

input {
            padding: 10px;
            margin-bottom: 10px;
            border-radius: 5px;
            border: 1px solid #ccc;
            transition: border-color 0.3s ease;
        }

input:focus {
            outline: none;
            border-color: #007bff;

}
    </style>
</body>

</html>

 
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React
        function App() {
            const [inputValue, setInputValue] = useState('');
​
​
            const handleInputChange = (e) => {
                const value = e.target.value;
​
                // Allow only positive numbers
                if (/^[0-9]*$/.test(value)) {
                    setInputValue(value);
                }
            };
​
            return (
                <div className='container'>
                    <h3>React Js Input field Allow only Positive Number</h3>
                    <input
                        type="text"
                        value={inputValue}
                        onChange={handleInputChange}
                        placeholder="Enter a positive number"
                    />
                </div>
            );
        }
​
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        * {
            box-sizing: border-box;
        }
​
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }
​
        .container {
            margin: 0 auto;
            width: 600px;
            text-align: center;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            padding: 20px;
        }
​
        h3 {
            margin-bottom: 20px;
        }
​
        input {
            padding: 10px;
            margin-bottom: 10px;
            border-radius: 5px;
            border: 1px solid #ccc;
            transition: border-color 0.3s ease;
        }
​
        input:focus {
            outline: none;
            border-color: #007bff;
​
        }
    </style>
</body>
​
</html>